^a Includes imputation of shipment data to account for nonrespondents.
^b Includes shipments of solar thermal collectors to the government, including some military, but excluding space applications.
^P = Preliminary.
Note: Total shipments as reported by respondents include all domestic and export shipments and may include imported collectors that subsequently were shipped to domestic or foreign customers.
Source: Energy Information Administration, Form EIA-63A, "Annual Solar Thermal Collector Manufacturers Survey."